منابع مشابه
Parasites and Insects Affecting Livestock
PARASITES that attack livestock and poultry may live on the skin or in its layers (external parasites) or in the digestive tract, the liver, tlie lungs, the kidneys, and elsewhere in the body (internal parasites). With few exceptions, the external parasites are insects or forms related to insects. Most of the internal parasites.are either microscopic organisms known as protozoa or belong to a g...
متن کاملRunning Head: Parasites and Organic Livestock
Organic livestock production has increased dramatically in recent years in Europe and other parts of the world. The aim of producing livestock under more natural conditions has led to a reversion to primarily outdoor production systems and less intensive housing when indoor, more forage-based diets, and a reduced reliance on external inputs like antiparasiticides. These major changes in livesto...
متن کاملThe effect of grazing management on livestock exposure to parasites via the faecal-oral route.
In grazing systems, heterogeneous distributions of forage resources and faeces result in localised accumulations of nutrients and parasites (both macroparasites and microparasites), creating trade-offs between the costs of exposure to infestation or infection and the benefits of nutrient intake. Each contact between livestock and faeces in the environment is a potential parasite/pathogen transm...
متن کاملAlternative approaches to control of parasites in livestock: Nordic and Baltic perspectives
Introduction It is evident from several on-farm surveys that levels of parasite infections vary markedly between livestock production systems and from one farm to another [1]. The background for these differences relates to livestock breeds, different management factors and other practices that directly or indirectly affect parasite infections, and also to farmers’ attitudes e.g. the chosen thr...
متن کاملTannin containing legumes as a model for nutraceuticals against digestive parasites in livestock.
Parasitic infections with gastrointestinal nematodes (GINs) still represent a worldwide major pathological threat associated with the outdoor production of various livestock species. Because of the widespread resistance to synthetic chemical anthelmintics, there is a strong impetus to explore novel approaches for a more integrated management of these infections. The use of nutraceuticals in the...
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ژورنال
عنوان ژورنال: Nature
سال: 1968
ISSN: 0028-0836,1476-4687
DOI: 10.1038/219306b0